1QBH image
Deposition Date 1999-04-20
Release Date 1999-10-20
Last Version Date 2024-05-22
Entry Detail
PDB ID:
1QBH
Keywords:
APOPTOSIS
Title:
SOLUTION STRUCTURE OF A BACULOVIRAL INHIBITOR OF APOPTOSIS (IAP) REPEAT
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
1000
Conformers Submitted:
20
Selection Criteria:
STRUCTURES WITH ACCEPTABLE COVALENT GEOMETRY,STRUCTURES WITH FAVORABLE NON- BOND ENERGY,STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS,STRUCTURES WITH THE LOWEST ENERGY,TARGET FUNCTION
1QBH validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:INHIBITOR OF APOPTOSIS PROTEIN (2MIHB/C-IAP-1)
Gene (Uniprot):BIRC2
Chain IDs:A
Chain Length:101
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q13490 Pfam ID:PF00653
Ligand Molecules
ZN
Primary Citation
Solution structure of a baculoviral inhibitor of apoptosis (IAP) repeat.
Nat.Struct.Biol. 6 648 651 (1999)
PMID: 10404221 DOI: 10.1038/10701

Abstact

Members of the inhibitor of apoptosis (IAP) family of proteins are able to inhibit cell death following viral infection, during development or in cell lines in vitro. All IAP proteins bear one or more baculoviral IAP repeats (BIRs). Here we describe the solution structure of the third BIR domain from the mammalian IAP homolog B (MIHB/c-IAP-1). The BIR domain has a novel fold that is stabilized by zinc tetrahedrally coordinated by one histidine and three cysteine residues. The structure consists of a series of short alpha-helices and turns with the zinc packed in an unusually hydrophobic environment created by residues that are highly conserved among all BIRs.

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Primary Citation of related structures
1QBH